If you're working on a tight budget, but don't want to compromise on quality, choose MB Quart's Discus Series subs.
The DWF-304 12" subwoofer doesn't skimp on the essentials. The sturdy cast alloy basket teams up with a treated paper woofer cone and polypropylene dustcap to produce plenty of clean, powerful bass. Platinum-coated binding posts ensure solid speaker wire connections, and heavy-duty internal parts stand up to the heat produced when you're rocking the lows.
The DWF-304 works best in small sealed sub boxes, handling a hefty 400 watts of power. Dual voice coils allow plenty of wiring options.